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Graham Cooks

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TOP 3
Chunping Wu; R Graham Cooks; Allison L Dill; Livia S Eberlin; Demian R Ifa
Mass spectrometry imaging under ambient conditions.
Livia S Eberlin; Alexandra J Golby; Jennifer L Ide; Alan K Jarmusch; Ferenc A Jolesz; Keith L Ligon; Xiaohui Liu; Isaiah Norton; Daniel Orringer; Sandro Santagata; Nathalie Y R Agar; Ian F Dunn; R Graham Cooks
Ambient mass spectrometry for the intraoperative molecular diagnosis of human brain tumors.
Guangtao Li; Xin Li; Zheng Ouyang; R Graham Cooks
Carbon-carbon bond activation in saturated hydrocarbons by field-assisted nitrogen fixation.

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All Publications

2013: Chunping Wu; R Graham Cooks; Allison L Dill; Livia S Eberlin; Demian R Ifa
Mass spectrometry imaging under ambient conditions.
Mass spectrometry reviews 2013;32(3):218-43.
2013: Livia S Eberlin; Alexandra J Golby; Jennifer L Ide; Alan K Jarmusch; Ferenc A Jolesz; Keith L Ligon; Xiaohui Liu; Isaiah Norton; Daniel Orringer; Sandro Santagata; Nathalie Y R Agar; Ian F Dunn; R Graham Cooks
Ambient mass spectrometry for the intraoperative molecular diagnosis of human brain tumors.
Proceedings of the National Academy of Sciences of the United States of America 2013;110(5):1611-6.
2013: Guangtao Li; Xin Li; Zheng Ouyang; R Graham Cooks
Carbon-carbon bond activation in saturated hydrocarbons by field-assisted nitrogen fixation.
Angewandte Chemie (International ed. in English) 2013;52(3):1040-3.
2013: Abraham K Badu-Tawiah; Livia S Eberlin; Zheng Ouyang; R Graham Cooks
Chemical aspects of the extractive methods of ambient ionization mass spectrometry.
Annual review of physical chemistry 2013;64():481-505.
2012: Sheran A Oradu; R Graham Cooks
Multistep mass spectrometry methodology for direct characterization of polar lipids in green microalgae using paper spray ionization.
Analytical chemistry 2012;84(24):10576-85.
2012: Christina R Ferreira; Judy E Hallett; Valentina Pirro; Livia S Eberlin; R Graham Cooks
Developmental phases of individual mouse preimplantation embryos characterized by lipid signatures using desorption electrospray ionization mass spectrometry.
Analytical and bioanalytical chemistry 2012;404(10):2915-26.
2012: Thomas Müller; Abraham Badu-Tawiah; R Graham Cooks
Accelerated carbon-carbon bond-forming reactions in preparative electrospray.
Angewandte Chemie (International ed. in English) 2012;51(47):11832-5.
2012: Abraham K Badu-Tawiah; Fred P M Jjunju; Anyin Li; R Graham Cooks
Peptide cross-linking at ambient surfaces by reactions of nanosprayed molecular cations.
Angewandte Chemie (International ed. in English) 2012;51(37):9417-21.
2012: Abraham K Badu-Tawiah; Dahlia I Campbell; R Graham Cooks
Accelerated C-N bond formation in dropcast thin films on ambient surfaces.
Journal of the American Society for Mass Spectrometry 2012;23(9):1461-8.
2012: Qian Yang; R Graham Cooks; Nicholas E Manicke; Christopher Petucci; He Wang; Zheng Ouyang
Direct and quantitative analysis of underivatized acylcarnitines in serum and whole blood using paper spray mass spectrometry.
Analytical and bioanalytical chemistry 2012;404(5):1389-97.
2012: Dahlia I Campbell; Livia S Eberlin; Christina R Ferreira; R Graham Cooks
Improved spatial resolution in the imaging of biological tissue using desorption electrospray ionization.
Analytical and bioanalytical chemistry 2012;404(2):389-98.
2012: J Isabella Zhang; Xin Li; Zheng Ouyang; R Graham Cooks
Direct analysis of steviol glycosides from Stevia leaves by ambient ionization mass spectrometry performed on whole leaves.
The Analyst 2012;137(13):3091-8.
2012: Zhiping Zhang; R Graham Cooks; Zheng Ouyang
Paper spray: a simple and efficient means of analysis of different contaminants in foodstuffs.
The Analyst 2012;137(11):2556-8.
2012: Abraham K Badu-Tawiah; Dahlia I Campbell; R Graham Cooks
Reactions of microsolvated organic compounds at ambient surfaces: droplet velocity, charge state, and solvent effects.
Journal of the American Society for Mass Spectrometry 2012;23(6):1077-84.
2012: Xingchuang Xiong; Wei Xu; Yukui Zhang; Justin M Wiseman; R Graham Cooks; Livia S Eberlin; Xiang Fang; Zejian Huang; You Jiang; Zheng Ouyang
Data processing for 3D mass spectrometry imaging.
Journal of the American Society for Mass Spectrometry 2012;23(6):1147-56.
2012: Valentina Pirro; Livia S Eberlin; Paolo Oliveri; R Graham Cooks
Interactive hyperspectral approach for exploring and interpreting DESI-MS images of cancerous and normal tissue sections.
The Analyst 2012;137(10):2374-80.
2012: Ryan D Espy; Nicholas E Manicke; Zheng Ouyang; R Graham Cooks
Rapid analysis of whole blood by paper spray mass spectrometry for point-of-care therapeutic drug monitoring.
The Analyst 2012;137(10):2344-9.
2012: Abraham K Badu-Tawiah; Jobin Cyriac; R Graham Cooks
Reactions of organic ions at ambient surfaces in a solvent-free environment.
Journal of the American Society for Mass Spectrometry 2012;23(5):842-9.
2012: Jobin Cyriac; Liang Gao; Guangtao Li; Michael Wleklinski; R Graham Cooks
In situ Raman spectroscopy of surfaces modified by ion soft landing.
The Analyst 2012;137(6):1363-9.
2012: Fatkhulla K Tadjimukhamedov; Guangming Huang; Zheng Ouyang; R Graham Cooks
Rapid detection of urushiol allergens of Toxicodendron genus using leaf spray mass spectrometry.
The Analyst 2012;137(5):1082-4.
2012: Sandilya Garimella; Jason D Harper; Guangming Huang; R Graham Cooks; Wei Xu; Zheng Ouyang
Gas-flow assisted ion transfer for mass spectrometry.
Journal of mass spectrometry : JMS 2012;47(2):201-7.
2012: Livia S Eberlin; Alexandra J Golby; Keith L Ligon; Isaiah Norton; Sandro Santagata; R Graham Cooks; Allison L Dill; Nathalie Y R Agar
Classifying human brain tumors by lipid imaging with mass spectrometry.
Cancer research 2012;72(3):645-54.
2012: Zhiping Zhang; Wei Xu; R Graham Cooks; Nicholas E Manicke; Zheng Ouyang
Silica coated paper substrate for paper-spray analysis of therapeutic drugs in dried blood spots.
Analytical chemistry 2012;84(2):931-8.
2012: C R Ferreira; J E Hallett; L S Eberlin; R Graham Cooks
Single oocyte and single embryo lipid analysis by desorption electrospray ionization mass spectrometry.
Journal of mass spectrometry : JMS 2012;47(1):29-33.
2011: Livia S Eberlin; Christina R Ferreira; Xiaohui Liu; Sandro Santagata; Nathalie Y R Agar; R Graham Cooks
Desorption electrospray ionization then MALDI mass spectrometry imaging of lipid and protein distributions in single tissue sections.
Analytical chemistry 2011;83(22):8366-71.
2011: Santosh Soparawalla; Fatkhulla K Tadjimukhamedov; Joshua S Wiley; Zheng Ouyang; R Graham Cooks
In situ analysis of agrochemical residues on fruit using ambient ionization on a handheld mass spectrometer.
The Analyst 2011;136(21):4392-6.
2011: Livia S Eberlin; Christina R Ferreira; Demian R Ifa; Allison L Dill; R Graham Cooks
Desorption electrospray ionization mass spectrometry for lipid characterization and biological tissue imaging.
Biochimica et biophysica acta 2011;1811(11):946-60.
2011: Jiangjiang Liu; R Graham Cooks; He Wang; Zheng Ouyang
Leaf spray: direct chemical analysis of plant material and living plants by mass spectrometry.
Analytical chemistry 2011;83(20):7608-13.
2011: Guangming Huang; Guangtao Li; R Graham Cooks
Induced nanoelectrospray ionization for matrix-tolerant and high-throughput mass spectrometry.
Angewandte Chemie (International ed. in English) 2011;50(42):9907-10.
2011: Allison L Dill; Livia S Eberlin; Demian R Ifa; Anthony B Costa; R Graham Cooks
Data quality in tissue analysis using desorption electrospray ionization.
Analytical and bioanalytical chemistry 2011;401(6):1949-61.
2011: Ryan D Espy; Abraham Badu-Tawiah; R Graham Cooks
Analysis and modification of surfaces using molecular ions in the ambient environment.
Current opinion in chemical biology 2011;15(5):741-7.
2011: Livia S Eberlin; Christina R Ferreira; Demian R Ifa; Liang Cheng; Allison L Dill; R Graham Cooks
Nondestructive, histologically compatible tissue imaging by desorption electrospray ionization mass spectrometry.
Chembiochem : a European journal of chemical biology 2011;12(14):2129-32.
2011: Nicholas Edward Manicke; Zheng Ouyang; Neil Spooner; Paul Abu-Rabie; R Graham Cooks
Quantitative analysis of therapeutic drugs in dried blood spot samples by paper spray mass spectrometry: an avenue to therapeutic drug monitoring.
Journal of the American Society for Mass Spectrometry 2011;22(9):1501-7.
2011: J Isabella Zhang; Anthony B Costa; W Andy Tao; R Graham Cooks
Direct detection of fatty acid ethyl esters using low temperature plasma (LTP) ambient ionization mass spectrometry for rapid bacterial differentiation.
The Analyst 2011;136(15):3091-7.
2011: Amitava Srimany; Vasudeva Bhat; R Graham Cooks; Demian R Ifa; Hemanta R Naik; T Pradeep
Direct analysis of camptothecin from Nothapodytes nimmoniana by desorption electrospray ionization mass spectrometry (DESI-MS).
The Analyst 2011;136(15):3066-8.
2011: Timothy A Masterson; Monica Mattarozzi; Allison L Dill; Livia S Eberlin; Stephen D W Beck; Federica Bianchi; Liang Cheng; R Graham Cooks
Distinctive glycerophospholipid profiles of human seminoma and adjacent normal tissues by desorption electrospray ionization imaging mass spectrometry.
Journal of the American Society for Mass Spectrometry 2011;22(8):1326-33.
2011: Thomas Müller; Sheran Oradu; R Graham Cooks; Demian R Ifa; Bernhard Kräutler
Direct plant tissue analysis and imprint imaging by desorption electrospray ionization mass spectrometry.
Analytical chemistry 2011;83(14):5754-61.
2011: Jobin Cyriac; Guangtao Li; R Graham Cooks
Vibrational spectroscopy and mass spectrometry for characterization of soft landed polyatomic molecules.
Analytical chemistry 2011;83(13):5114-21.
2011: J Isabella Zhang; W Andy Tao; R Graham Cooks
Facile determination of double bond position in unsaturated fatty acids and esters by low temperature plasma ionization mass spectrometry.
Analytical chemistry 2011;83(12):4738-44.
2011: Jonell N Smith; Robert J Noll; R Graham Cooks
Facility monitoring of chemical warfare agent simulants in air using an automated, field-deployable, miniature mass spectrometer.
Rapid communications in mass spectrometry : RCM 2011;25(10):1437-44.
2011: George C-Y Chan; Jacob T Shelley; Joshua S Wiley; Carsten Engelhard; Ayanna U Jackson; R Graham Cooks; Gary M Hieftje
Elucidation of reaction mechanisms responsible for afterglow and reagent-ion formation in the low-temperature plasma probe ambient ionization source.
Analytical chemistry 2011;83(10):3675-86.
2011: Abraham K Badu-Tawiah; Chunping Wu; R Graham Cooks
Ambient ion soft landing.
Analytical chemistry 2011;83(7):2648-54.
2011: Anyin Li; He Wang; Zheng Ouyang; R Graham Cooks
Paper spray ionization of polar analytes using non-polar solvents.
Chemical communications (Cambridge, England) 2011;47(10):2811-3.
2011: Allison L Dill; Livia S Eberlin; Demian R Ifa; R Graham Cooks
Perspectives in imaging using mass spectrometry.
Chemical communications (Cambridge, England) 2011;47(10):2741-6.
2011: Guangming Huang; Guangtao Li; Jason Ducan; Zheng Ouyang; R Graham Cooks
Synchronized inductive desorption electrospray ionization mass spectrometry.
Angewandte Chemie (International ed. in English) 2011;50(11):2503-6.
2011: Keyong Hou; Jian Xu; Wei Xu; R Graham Cooks; Zheng Ouyang
Sampling wand for an ion trap mass spectrometer.
Analytical chemistry 2011;83(5):1857-61.
2011: Allison L Dill; Livia S Eberlin; Anthony B Costa; Cheng Zheng; Demian R Ifa; Liang Cheng; Timothy A Masterson; Michael O Koch; Olga Vitek; R Graham Cooks
Multivariate statistical identification of human bladder carcinomas using ambient ionization imaging mass spectrometry.
Chemistry (Weinheim an der Bergstrasse, Germany) 2011;17(10):2897-902.
2011: He Wang; Nicholas E Manicke; Qian Yang; Lingxing Zheng; Riyi Shi; R Graham Cooks; Zheng Ouyang
Direct analysis of biological tissue by paper spray mass spectrometry.
Analytical chemistry 2011;83(4):1197-201.
2011: Juan F Garcia-Reyes; Jason D Harper; Gary A Salazar; Nicholas A Charipar; Zheng Ouyang; R Graham Cooks
Detection of explosives and related compounds by low-temperature plasma ambient ionization mass spectrometry.
Analytical chemistry 2011;83(3):1084-92.
2011: Anthony B Costa; R Graham Cooks
Origin of chiral selectivity in gas-phase serine tetramers.
Physical chemistry chemical physics : PCCP 2011;13(3):877-85.
2011: Wen-Ping Peng; Grant E Johnson; Ivy C Fortmeyer; Peng Wang; Omar Hadjar; R Graham Cooks; Julia Laskin
Redox chemistry in thin layers of organometallic complexes prepared using ion soft landing.
Physical chemistry chemical physics : PCCP 2011;13(1):267-75.
2011: Jonell N Smith; Adam D Keil; Robert J Noll; R Graham Cooks
Ion/molecule reactions for detecting ammonia using miniature cylindrical ion trap mass spectrometers.
The Analyst 2011;136(1):120-7.
2011: R Graham Cooks; Nicholas E Manicke; Allison L Dill; Demian R Ifa; Livia S Eberlin; Anthony B Costa; He Wang; Guangming Huang; Zheng Ouyang
New ionization methods and miniature mass spectrometers for biomedicine: DESI imaging for cancer diagnostics and paper spray ionization for therapeutic drug monitoring.
Faraday discussions 2011;149():247-67; discussion 333-56.
2011: Marion Girod; Yunzhou Shi; Ji-Xin Cheng; R Graham Cooks
Mapping lipid alterations in traumatically injured rat spinal cord by desorption electrospray ionization imaging mass spectrometry.
Analytical chemistry 2011;83(1):207-15.
2011: Ayanna U Jackson; Thomas Shum; Ewa Sokol; Allison Dill; R Graham Cooks
Enhanced detection of olefins using ambient ionization mass spectrometry: Ag+ adducts of biologically relevant alkenes.
Analytical and bioanalytical chemistry 2011;399(1):367-76.
2010: Allison L Dill; Livia S Eberlin; Cheng Zheng; Anthony B Costa; Demian R Ifa; Liang Cheng; Timothy A Masterson; Michael O Koch; Olga Vitek; R Graham Cooks
Multivariate statistical differentiation of renal cell carcinomas based on lipidomic analysis by ambient ionization imaging mass spectrometry.
Analytical and bioanalytical chemistry 2010;398(7-8):2969-78.
2010: Shane R Ellis; Chunping Wu; Jane M Deeley; Xiangjia Zhu; Roger J W Truscott; Marc in het Panhuis; R Graham Cooks; Todd W Mitchell; Stephen J Blanksby
Imaging of human lens lipids by desorption electrospray ionization mass spectrometry.
Journal of the American Society for Mass Spectrometry 2010;21(12):2095-104.
2010: Livia S Eberlin; Renato Haddad; Ramon C Sarabia Neto; Ricardo G Cosso; Denison R J Maia; Adriano O Maldaner; Jorge Jardim Zacca; Gustavo B Sanvido; Wanderson Romão; Boniek G Vaz; Demian R Ifa; Allison Dill; R Graham Cooks; Marcos N Eberlin
Instantaneous chemical profiles of banknotes by ambient mass spectrometry.
The Analyst 2010;135(10):2533-9.
2010: Fatkhulla K Tadjimukhamedov; Ayanna U Jackson; Erkinjon G Nazarov; Zheng Ouyang; R Graham Cooks
Evaluation of a differential mobility spectrometer/miniature mass spectrometer system.
Journal of the American Society for Mass Spectrometry 2010;21(9):1477-81.
2010: Livia S Eberlin; Allison L Dill; Alexandra J Golby; Keith L Ligon; Justin M Wiseman; R Graham Cooks; Nathalie Y R Agar
Discrimination of human astrocytoma subtypes by lipid analysis using desorption electrospray ionization imaging mass spectrometry.
Angewandte Chemie (International ed. in English) 2010;49(34):5953-6.
2010: Santosh Soparawalla; Gary A Salazar; Ewa Sokol; Richard H Perry; R Graham Cooks
Trace detection of non-uniformly distributed analytes on surfaces using mass transfer and large-area desorption electrospray ionization (DESI) mass spectrometry.
The Analyst 2010;135(8):1953-60.
2010: Abraham Badu-Tawiah; R Graham Cooks
Enhanced ion signals in desorption electrospray ionization using surfactant spray solutions.
Journal of the American Society for Mass Spectrometry 2010;21(8):1423-31.
2010: Marion Girod; Yunzhou Shi; Ji-Xin Cheng; R Graham Cooks
Desorption electrospray ionization imaging mass spectrometry of lipids in rat spinal cord.
Journal of the American Society for Mass Spectrometry 2010;21(7):1177-89.
2010: Nathaniel L Sanders; Sameer Kothari; Guangming Huang; Gary Salazar; R Graham Cooks
Detection of explosives as negative ions directly from surfaces using a miniature mass spectrometer.
Analytical chemistry 2010;82(12):5313-6.
2010: Jonell N Smith; Adam Keil; Jane Likens; Robert J Noll; R Graham Cooks
Facility monitoring of toxic industrial compounds in air using an automated, fieldable, miniature mass spectrometer.
The Analyst 2010;135(5):994-1003.
2010: Joshua S Wiley; Juan F García-Reyes; Jason D Harper; Nicholas A Charipar; Zheng Ouyang; R Graham Cooks
Screening of agrochemicals in foodstuffs using low-temperature plasma (LTP) ambient ionization mass spectrometry.
The Analyst 2010;135(5):971-9.
2010: Ayanna U Jackson; Juan F Garcia-Reyes; Jason D Harper; Joshua S Wiley; Antonio Molina-Díaz; Zheng Ouyang; R Graham Cooks
Analysis of drugs of abuse in biofluids by low temperature plasma (LTP) ionization mass spectrometry.
The Analyst 2010;135(5):927-33.
2010: Livia S Eberlin; Allison L Dill; Anthony B Costa; Demian R Ifa; Liang Cheng; Timothy Masterson; Michael Koch; Timothy L Ratliff; R Graham Cooks
Cholesterol sulfate imaging in human prostate cancer tissue by desorption electrospray ionization mass spectrometry.
Analytical chemistry 2010;82(9):3430-4.
2010: Guangming Huang; Wei Xu; Michelle A Visbal-Onufrak; Zheng Ouyang; R Graham Cooks
Direct analysis of melamine in complex matrices using a handheld mass spectrometer.
The Analyst 2010;135(4):705-11.
2010: Demian R Ifa; Chunping Wu; Zheng Ouyang; R Graham Cooks
Desorption electrospray ionization and other ambient ionization methods: current progress and preview.
The Analyst 2010;135(4):669-81.
2010: Yu Xia; R Graham Cooks
Plasma induced oxidative cleavage of disulfide bonds in polypeptides during nanoelectrospray ionization.
Analytical chemistry 2010;82(7):2856-64.
2010: Abraham Badu-Tawiah; Celine Bland; Dahlia I Campbell; R Graham Cooks
Non-aqueous spray solvents and solubility effects in desorption electrospray ionization.
Journal of the American Society for Mass Spectrometry 2010;21(4):572-9.
2010: Jiangjiang Liu; He Wang; Nicholas E Manicke; Jin-Ming Lin; R Graham Cooks; Zheng Ouyang
Development, characterization, and application of paper spray ionization.
Analytical chemistry 2010;82(6):2463-71.
2010: Giuseppe Paglia; Demian R Ifa; Chunping Wu; Gaetano Corso; R Graham Cooks
Desorption electrospray ionization mass spectrometry analysis of lipids after two-dimensional high-performance thin-layer chromatography partial separation.
Analytical chemistry 2010;82(5):1744-50.
2010: Chunping Wu; Kuangnan Qian; Marcela Nefliu; R Graham Cooks
Ambient analysis of saturated hydrocarbons using discharge-induced oxidation in desorption electrospray ionization.
Journal of the American Society for Mass Spectrometry 2010;21(2):261-7.
2010: Liang Gao; Guangtao Li; R Graham Cooks
Axial CID and high pressure resonance CID in a miniature ion trap mass spectrometer using a discontinuous atmospheric pressure interface.
Journal of the American Society for Mass Spectrometry 2010;21(2):209-14.
2010: R Graham Cooks; Demian R Ifa; Gautam Sharma; Fatkhulla Kh Tadjimukhamedov; Zheng Ouyang
Perspectives and retrospectives in mass spectrometry: one view.
European journal of mass spectrometry (Chichester, England) 2010;16(3):283-300.
2010: Nathaniel L Sanders; Ewa Sokol; Richard H Perry; Guangming Huang; Robert J Noll; Jason S Duncan; R Graham Cooks
Hand-held mass spectrometer for environmentally relevant analytes using a variety of sampling and ionization methods.
European journal of mass spectrometry (Chichester, England) 2010;16(1):11-20.
2010: He Wang; Jiangjiang Liu; R Graham Cooks; Zheng Ouyang
Paper spray for direct analysis of complex mixtures using mass spectrometry.
Angewandte Chemie (International ed. in English) 2010;49(5):877-80.
2010: Livia S Eberlin; Demian R Ifa; Chunping Wu; R Graham Cooks
Three-dimensional vizualization of mouse brain by lipid analysis using ambient ionization mass spectrometry.
Angewandte Chemie (International ed. in English) 2010;49(5):873-6.
2010: Chunping Wu; Demian R Ifa; Nicholas E Manicke; R Graham Cooks
Molecular imaging of adrenal gland by desorption electrospray ionization mass spectrometry.
The Analyst 2010;135(1):28-32.
2010: Guangming Huang; Liang Gao; Jason Duncan; Jason D Harper; Nathaniel L Sanders; Zheng Ouyang; R Graham Cooks
Direct detection of benzene, toluene, and ethylbenzene at trace levels in ambient air by atmospheric pressure chemical ionization using a handheld mass spectrometer.
Journal of the American Society for Mass Spectrometry 2010;21(1):132-5.
2010: Qingyu Song; Wei Xu; Scott A Smith; Liang Gao; William J Chappell; R Graham Cooks; Zheng Ouyang
Ion trap mass analysis at high pressure: an experimental characterization.
Journal of mass spectrometry : JMS 2010;45(1):26-34.
2009: Allison L Dill; Demian R Ifa; Nicholas E Manicke; Anthony B Costa; José A Ramos-Vara; Deborah W Knapp; R Graham Cooks
Lipid profiles of canine invasive transitional cell carcinoma of the urinary bladder and adjacent normal tissue by desorption electrospray ionization imaging mass spectrometry.
Analytical chemistry 2009;81(21):8758-64.
2009: Nicholas E Manicke; Marcela Nefliu; Chunping Wu; John W Woods; Vladimir Reiser; Ronald C Hendrickson; R Graham Cooks
Imaging of lipids in atheroma by desorption electrospray ionization mass spectrometry.
Analytical chemistry 2009;81(21):8702-7.
2009: Juan F García-Reyes; Fabio Mazzoti; Jason D Harper; Nicholas A Charipar; Sheran Oradu; Zheng Ouyang; Giovanni Sindona; R Graham Cooks
Direct olive oil analysis by low-temperature plasma (LTP) ambient ionization mass spectrometry.
Rapid communications in mass spectrometry : RCM 2009;23(19):3057-62.
2009: Chunping Wu; Demian R Ifa; Nicholas E Manicke; R Graham Cooks
Rapid, direct analysis of cholesterol by charge labeling in reactive desorption electrospray ionization.
Analytical chemistry 2009;81(18):7618-24.
2009: Allison L Dill; Demian R Ifa; Nicholas E Manicke; Zheng Ouyang; R Graham Cooks
Mass spectrometric imaging of lipids using desorption electrospray ionization.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences 2009;877(26):2883-9.
2009: Richard H Perry; Qizhi Hu; Gary A Salazar; R Graham Cooks; Robert J Noll
Rephasing ion packets in the Orbitrap mass analyzer to improve resolution and peak shape.
Journal of the American Society for Mass Spectrometry 2009;20(8):1397-404.
2009: Demian R Ifa; Ayanna U Jackson; Giuseppe Paglia; R Graham Cooks
Forensic applications of ambient ionization mass spectrometry.
Analytical and bioanalytical chemistry 2009;394(8):1995-2008.
2009: Miriam Fico; Jeffrey D Maas; Scott A Smith; Anthony B Costa; Zheng Ouyang; William J Chappell; R Graham Cooks
Circular arrays of polymer-based miniature rectilinear ion traps.
The Analyst 2009;134(7):1338-47.
2009: Zongxiu Nie; Guangtao Li; Michael P Goodwin; Liang Gao; Jobin Cyriac; R Graham Cooks
In situ SIMS analysis and reactions of surfaces prepared by soft landing of mass-selected cations and anions using an ion trap mass spectrometer.
Journal of the American Society for Mass Spectrometry 2009;20(6):949-56.
2009: Ayanna U Jackson; Alessandra Tata; Chunping Wu; Richard H Perry; George Haas; Leslie West; R Graham Cooks
Direct analysis of Stevia leaves for diterpene glycosides by desorption electrospray ionization mass spectrometry.
The Analyst 2009;134(5):867-74.
2009: Yishu Song; Nari Talaty; Kirill Datsenko; Barry L Wanner; R Graham Cooks
In vivo recognition of Bacillus subtilis by desorption electrospray ionization mass spectrometry (DESI-MS).
The Analyst 2009;134(5):838-41.
2009: Zheng Ouyang; Robert J Noll; R Graham Cooks
Handheld miniature ion trap mass spectrometers.
Analytical chemistry 2009;81(7):2421-5.
2009: Qingyu Song; Scott A Smith; Liang Gao; Wei Xu; Michael Volný; Zheng Ouyang; R Graham Cooks
Mass selection of ions from beams using waveform isolation in radiofrequency quadrupoles.
Analytical chemistry 2009;81(5):1833-40.
2009: Wei Xu; William J Chappell; R Graham Cooks; Zheng Ouyang
Characterization of electrode surface roughness and its impact on ion trap mass analysis.
Journal of mass spectrometry : JMS 2009;44(3):353-60.
2009: Sameer Kothari; Qingyu Song; Yu Xia; Miriam Fico; Dennis Taylor; Jonathan W Amy; George Stafford; R Graham Cooks
Multiplexed four-channel rectilinear ion trap mass spectrometer.
Analytical chemistry 2009;81(4):1570-9.
2009: Guangming Huang; Zheng Ouyang; R Graham Cooks
High-throughput trace melamine analysis in complex mixtures.
Chemical communications (Cambridge, England) 2009;(5):556-8.
2009: Nicholas E Manicke; Thomas Kistler; Demian R Ifa; R Graham Cooks; Zheng Ouyang
High-throughput quantitative analysis by desorption electrospray ionization mass spectrometry.
Journal of the American Society for Mass Spectrometry 2009;20(2):321-5.
2009: Juan F García-Reyes; Ayanna U Jackson; Antonio Molina-Díaz; R Graham Cooks
Desorption electrospray ionization mass spectrometry for trace analysis of agrochemicals in food.
Analytical chemistry 2009;81(2):820-9.
2009: Zheng Ouyang; R Graham Cooks
Miniature mass spectrometers.
Annual review of analytical chemistry (Palo Alto, Calif.) 2009;2():187-214.
2009: Na Na; Yu Xia; Zhenli Zhu; Xinrong Zhang; R Graham Cooks
Birch reduction of benzene in a low-temperature plasma.
Angewandte Chemie (International ed. in English) 2009;48(11):2017-9.
2008: Jason D Harper; Nicholas A Charipar; Christopher C Mulligan; Xinrong Zhang; R Graham Cooks; Zheng Ouyang
Low-temperature plasma probe for ambient desorption ionization.
Analytical chemistry 2008;80(23):9097-104.
2008: Lívia S Eberlin; Yu Xia; Hao Chen; R Graham Cooks
Atmospheric pressure thermal dissociation of phospho- and sulfopeptides.
Journal of the American Society for Mass Spectrometry 2008;19(12):1897-905.
2008: Justin M Wiseman; Demian R Ifa; Yongxin Zhu; Candice B Kissinger; Nicholas E Manicke; Peter T Kissinger; R Graham Cooks
Desorption electrospray ionization mass spectrometry: Imaging drugs and metabolites in tissues.
Proceedings of the National Academy of Sciences of the United States of America 2008;105(47):18120-5.
2008: Nari Talaty; Christopher C Mulligan; Dina R Justes; Ayanna U Jackson; Robert J Noll; R Graham Cooks
Fabric analysis by ambient mass spectrometry for explosives and drugs.
The Analyst 2008;133(11):1532-40.
2008: Wen-Ping Peng; Mike P Goodwin; Hao Chen; R Graham Cooks; Jonathan Wilker
Thermal formation of mixed-metal inorganic complexes at atmospheric pressure.
Rapid communications in mass spectrometry : RCM 2008;22(22):3540-8.
2008: Richard H Perry; R Graham Cooks; Robert J Noll
Orbitrap mass spectrometry: instrumentation, ion motion and applications.
Mass spectrometry reviews 2008;27(6):661-99.
2008: Liang Gao; Andy Sugiarto; Jason D Harper; R Graham Cooks; Zheng Ouyang
Design and characterization of a multisource hand-held tandem mass spectrometer.
Analytical chemistry 2008;80(19):7198-205.
2008: Wen-Ping Peng; Michael P Goodwin; Zongxiu Nie; Michael Volný; Zheng Ouyang; R Graham Cooks
Ion soft landing using a rectilinear ion trap mass spectrometer.
Analytical chemistry 2008;80(17):6640-9.
2008: Demian R Ifa; Nicholas E Manicke; Allison L Dill; R Graham Cooks
Latent fingerprint chemical imaging by mass spectrometry.
Science (New York, N.Y.) 2008;321(5890):805.
2008: Ewa Sokol; Kathleen E Edwards; Kuangnan Qian; R Graham Cooks
Rapid hydrocarbon analysis using a miniature rectilinear ion trap mass spectrometer.
The Analyst 2008;133(8):1064-71.
2008: Tiina J Kauppila; Nari Talaty; Ayanna U Jackson; Tapio Kotiaho; Risto Kostiainen; R Graham Cooks
Carbohydrate and steroid analysis by desorption electrospray ionization mass spectrometry.
Chemical communications (Cambridge, England) 2008;(23):2674-6.
2008: Liang Gao; R Graham Cooks; Zheng Ouyang
Breaking the pumping speed barrier in mass spectrometry: discontinuous atmospheric pressure interface.
Analytical chemistry 2008;80(11):4026-32.
2008: Ayanna U Jackson; Sean R Werner; Nari Talaty; Yishu Song; Karinna Campbell; R Graham Cooks; John A Morgan
Targeted metabolomic analysis of Escherichia coli by desorption electrospray ionization and extractive electrospray ionization mass spectrometry.
Analytical biochemistry 2008;375(2):272-81.
2008: Michael Volný; Andre Venter; Scott A Smith; Marco Pazzi; R Graham Cooks
Surface effects and electrochemical cell capacitance in desorption electrospray ionization.
The Analyst 2008;133(4):525-31.
2008: Nicholas E Manicke; Justin M Wiseman; Demian R Ifa; R Graham Cooks
Desorption electrospray ionization (DESI) mass spectrometry and tandem mass spectrometry (MS/MS) of phospholipids and sphingolipids: ionization, adduct formation, and fragmentation.
Journal of the American Society for Mass Spectrometry 2008;19(4):531-43.
2008: Ismael Cotte-Rodríguez; Heriberto Hernandez-Soto; Hao Chen; R Graham Cooks
In situ trace detection of peroxide explosives by desorption electrospray ionization and desorption atmospheric pressure chemical ionization.
Analytical chemistry 2008;80(5):1512-9.
2008: Marcela Nefliu; Jonell N Smith; Andre Venter; R Graham Cooks
Internal energy distributions in desorption electrospray ionization (DESI).
Journal of the American Society for Mass Spectrometry 2008;19(3):420-7.
2008: Adam Keil; Heriberto Hernandez-Soto; Robert J Noll; Miriam Fico; Liang Gao; Zheng Ouyang; R Graham Cooks
Monitoring of toxic compounds in air using a handheld rectilinear ion trap mass spectrometer.
Analytical chemistry 2008;80(3):734-41.
2008: Zoltan Takats; Justin M Wiseman; Demian R Ifa; R Graham Cooks
Desorption Electrospray Ionization: Proteomics Studies by a Method That Bridges ESI and MALDI.
CSH protocols 2008;2008():pdb.top37.
2008: Zoltan Takats; Justin M Wiseman; Demian R Ifa; R Graham Cooks
In Situ Desorption Electrospray Ionization (DESI) Analysis of Tissue Sections.
CSH protocols 2008;2008():pdb.prot4994.
2008: Zoltan Takats; Justin M Wiseman; Demian R Ifa; R Graham Cooks
Desorption Electrospray Ionization (DESI) Analysis of Tryptic Digests/Peptides.
CSH protocols 2008;2008():pdb.prot4993.
2008: Zoltan Takats; Justin M Wiseman; Demian R Ifa; R Graham Cooks
Desorption Electrospray Ionization (DESI) Analysis of Intact Proteins/Oligopeptides.
CSH protocols 2008;2008():pdb.prot4992.
2008: Yu Xia; Zheng Ouyang; R Graham Cooks
Peptide fragmentation assisted by surfaces treated with a low-temperature plasma in nanoESI.
Angewandte Chemie (International ed. in English) 2008;47(45):8646-9.
2008: Hao Chen; Livia S Eberlin; Marcela Nefliu; Rodinei Augusti; R Graham Cooks
Organic reactions of ionic intermediates promoted by atmospheric-pressure thermal activation.
Angewandte Chemie (International ed. in English) 2008;47(18):3422-5.
2008: Justin M Wiseman; Demian R Ifa; Andre Venter; R Graham Cooks
Ambient molecular imaging by desorption electrospray ionization mass spectrometry.
Nature protocols 2008;3(3):517-24.
2008: Demian R Ifa; Nicholas E Manicke; Allison L Rusine; R Graham Cooks
Quantitative analysis of small molecules by desorption electrospray ionization mass spectrometry from polytetrafluoroethylene surfaces.
Rapid communications in mass spectrometry : RCM 2008;22(4):503-10.
2007: Ayanna U Jackson; Nari Talaty; R Graham Cooks; Gary J Van Berkel
Salt tolerance of desorption electrospray ionization (DESI).
Journal of the American Society for Mass Spectrometry 2007;18(12):2218-25.
2007: Guangming Huang; Hao Chen; Xinrong Zhang; R Graham Cooks; Zheng Ouyang
Rapid screening of anabolic steroids in urine by reactive desorption electrospray ionization.
Analytical chemistry 2007;79(21):8327-32.
2007: Miriam Fico; Meng Yu; Zheng Ouyang; R Graham Cooks; William J Chappell
Miniaturization and geometry optimization of a polymer-based rectilinear ion trap.
Analytical chemistry 2007;79(21):8076-82.
2007: Adam Keil; Nari Talaty; Christian Janfelt; Robert J Noll; Liang Gao; Zheng Ouyang; R Graham Cooks
Ambient mass spectrometry with a handheld mass spectrometer at high pressure.
Analytical chemistry 2007;79(20):7734-9.
2007: Anthony B Costa; R Graham Cooks
Simulation of atmospheric transport and droplet-thin film collisions in desorption electrospray ionization.
Chemical communications (Cambridge, England) 2007;(38):3915-7.
2007: Ismael Cotte-Rodríguez; Christopher C Mulligan; R Graham Cooks
Non-proximate detection of small and large molecules by desorption electrospray ionization and desorption atmospheric pressure chemical ionization mass spectrometry: instrumentation and applications in forensics, chemistry, and biology.
Analytical chemistry 2007;79(18):7069-77.
2007: Tiina J Kauppila; Nari Talaty; Tiia Kuuranne; Tapio Kotiaho; Risto Kostiainen; R Graham Cooks
Rapid analysis of metabolites and drugs of abuse from urine samples by desorption electrospray ionization-mass spectrometry.
The Analyst 2007;132(9):868-75.
2007: Andre Venter; R Graham Cooks
Desorption electrospray ionization in a small pressure-tight enclosure.
Analytical chemistry 2007;79(16):6398-403.
2007: Yishu Song; R Graham Cooks
Reactive desorption electrospray ionization for selective detection of the hydrolysis products of phosphonate esters.
Journal of mass spectrometry : JMS 2007;42(8):1086-92.
2007: Dina R Justes; Nari Talaty; Ismael Cotte-Rodriguez; R Graham Cooks
Detection of explosives on skin using ambient ionization mass spectrometry.
Chemical communications (Cambridge, England) 2007;(21):2142-4.
2007: Qizhi Hu; R Graham Cooks; Robert J Noll
Phase-enhanced selective ion ejection in an orbitrap mass spectrometer.
Journal of the American Society for Mass Spectrometry 2007;18(6):980-3.
2007: Hao Chen; Livia S Eberlin; R Graham Cooks
Neutral fragment mass spectra via ambient thermal dissociation of peptide and protein ions.
Journal of the American Chemical Society 2007;129(18):5880-6.
2007: Demian R Ifa; L M Gumaelius; L S Eberlin; N E Manicke; R Graham Cooks
Forensic analysis of inks by imaging desorption electrospray ionization (DESI) mass spectrometry.
The Analyst 2007;132(5):461-7.
2007: Liang Gao; Qingyu Song; Robert J Noll; Jason Duncan; R Graham Cooks; Zheng Ouyang
Glow discharge electron impact ionization source for miniature mass spectrometers.
Journal of mass spectrometry : JMS 2007;42(5):675-80.
2007: Sergio C Nanita; Ewa Sokol; R Graham Cooks
Alkali metal-cationized serine clusters studied by sonic spray ionization tandem mass spectrometry.
Journal of the American Society for Mass Spectrometry 2007;18(5):856-68.
2007: Brandy L Young; R Graham Cooks; Michelle C Madden; Michael Bair; Jingpin Jia; Anne-Françoise Aubry; Scott A Miller
Chiral purity assay for Flindokalner using tandem mass spectrometry: method development, validation, and benchmarking.
Journal of pharmaceutical and biomedical analysis 2007;43(5):1602-8.
2007: Richard H Perry; Chunping Wu; Marcela Nefliu; R Graham Cooks
Serine sublimes with spontaneous chiral amplification.
Chemical communications (Cambridge, England) 2007;(10):1071-3.
2007: Scott A Smith; Thomas A Blake; Demian R Ifa; R Graham Cooks; Zheng Ouyang
Dual-source mass spectrometer with MALDI-LIT-ESI configuration.
Journal of proteome research 2007;6(2):837-45.
2007: Yishu Song; Nari Talaty; W Andy Tao; Zhengzheng Pan; R Graham Cooks
Rapid ambient mass spectrometric profiling of intact, untreated bacteria using desorption electrospray ionization.
Chemical communications (Cambridge, England) 2007;(1):61-3.
2007: Christopher C Mulligan; Denise K MacMillan; Robert J Noll; R Graham Cooks
Fast analysis of high-energy compounds and agricultural chemicals in water with desorption electrospray ionization mass spectrometry.
Rapid communications in mass spectrometry : RCM 2007;21(22):3729-36.
2007: Zheng Ouyang; L Gao; M Fico; William J Chappell; R J Noll; R Graham Cooks
Quadrupole ion traps and trap arrays: geometry, material, scale, performance.
European journal of mass spectrometry (Chichester, England) 2007;13(1):13-8.
2007: Haiwei Gu; Huanwen Chen; Zhengzheng Pan; Ayanna U Jackson; Nari Talaty; Bowei Xi; Candice B Kissinger; Chester Duda; Doug Mann; Daniel Raftery; R Graham Cooks
Monitoring diet effects via biofluids and their implications for metabolomics studies.
Analytical chemistry 2007;79(1):89-97.
2007: Zhengzheng Pan; Haiwei Gu; Nari Talaty; Huanwen Chen; Narasimhamurthy Shanaiah; Bryan E Hainline; R Graham Cooks; Daniel Raftery
Principal component analysis of urine metabolites detected by NMR and DESI-MS in patients with inborn errors of metabolism.
Analytical and bioanalytical chemistry 2007;387(2):539-49.
2006: Pengxiang Yang; Ruifeng Xu; Sergio C Nanita; R Graham Cooks
Thermal formation of homochiral serine clusters and implications for the origin of homochirality.
Journal of the American Chemical Society 2006;128(51):17074-86.
2006: Andre Venter; Paul E Sojka; R Graham Cooks
Droplet dynamics and ionization mechanisms in desorption electrospray ionization mass spectrometry.
Analytical chemistry 2006;78(24):8549-55.
2006: Justin M Wiseman; Demian R Ifa; Qingyu Song; R Graham Cooks
Tissue imaging at atmospheric pressure using desorption electrospray ionization (DESI) mass spectrometry.
Angewandte Chemie (International ed. in English) 2006;45(43):7188-92.
2006: Liang Gao; Qingyu Song; Garth E Patterson; R Graham Cooks; Zheng Ouyang
Handheld rectilinear ion trap mass spectrometer.
Analytical chemistry 2006;78(17):5994-6002.
2006: Regina Sparrapan; Lívia S Eberlin; Renato Haddad; R Graham Cooks; Marcos N Eberlin; Rodinei Augusti
Ambient Eberlin reactions via desorption electrospray ionization mass spectrometry.
Journal of mass spectrometry : JMS 2006;41(9):1242-6.
2006: Guangxiang Wu; R Graham Cooks; Zheng Ouyang; Meng Yu; William J Chappell; Wolfgang R Plass
Ion trajectory simulation for electrode configurations with arbitrary geometries.
Journal of the American Society for Mass Spectrometry 2006;17(9):1216-28.
2006: Marcela Nefliu; R Graham Cooks; Colin Moore
Enhanced desorption ionization using oxidizing electrosprays.
Journal of the American Society for Mass Spectrometry 2006;17(8):1091-5.
2006: Ismael Cotte-Rodríguez; R Graham Cooks
Non-proximate detection of explosives and chemical warfare agent simulants by desorption electrospray ionization mass spectrometry.
Chemical communications (Cambridge, England) 2006;(28):2968-70.
2006: Amy M Tabert; Michael P Goodwin; Jason S Duncan; Charles D Fico; R Graham Cooks
Multiplexed rectilinear ion trap mass spectrometer for high-throughput analysis.
Analytical chemistry 2006;78(14):4830-8.
2006: Hao Chen; Zheng Ouyang; R Graham Cooks
Thermal production and reactions of organic ions at atmospheric pressure.
Angewandte Chemie (International ed. in English) 2006;45(22):3656-60.
2006: Huanwen Chen; Andre Venter; R Graham Cooks
Extractive electrospray ionization for direct analysis of undiluted urine, milk and other complex mixtures without sample preparation.
Chemical communications (Cambridge, England) 2006;(19):2042-4.
2006: Christopher C Mulligan; Nari Talaty; R Graham Cooks
Desorption electrospray ionization with a portable mass spectrometer: in situ analysis of ambient surfaces.
Chemical communications (Cambridge, England) 2006;(16):1709-11.
2006: Ismael Cotte-Rodríguez; Dina R Justes; Sergio C Nanita; Robert J Noll; Christopher C Mulligan; Nathaniel L Sanders; R Graham Cooks
Analysis of gaseous toxic industrial compounds and chemical warfare agent simulants by atmospheric pressure ionization mass spectrometry.
The Analyst 2006;131(4):579-89.
2006: Christopher C Mulligan; Dina R Justes; Robert J Noll; Nathaniel L Sanders; Brian C Laughlin; R Graham Cooks
Direct monitoring of toxic compounds in air using a portable mass spectrometer.
The Analyst 2006;131(4):556-67.
2006: Yishu Song; Guangxiang Wu; Qingyu Song; R Graham Cooks; Zheng Ouyang; Wolfgang R Plass
Novel linear ion trap mass analyzer composed of four planar electrodes.
Journal of the American Society for Mass Spectrometry 2006;17(4):631-9.
2006: R Graham Cooks; Zheng Ouyang; Zoltan Takats; Justin M Wiseman
Detection Technologies. Ambient mass spectrometry.
Science (New York, N.Y.) 2006;311(5767):1566-70.
2006: Sunnie Myung; Justin M Wiseman; Stephen J Valentine; Zoltan Takats; R Graham Cooks; David E Clemmer
Coupling desorption electrospray ionization with ion mobility/mass spectrometry for analysis of protein structure: evidence for desorption of folded and denatured States.
The journal of physical chemistry. B 2006;110(10):5045-51.
2006: Ismael Cotte-Rodríguez; Hao Chen; R Graham Cooks
Rapid trace detection of triacetone triperoxide (TATP) by complexation reactions during desorption electrospray ionization.
Chemical communications (Cambridge, England) 2006;(9):953-5.
2006: Qizhi Hu; Alexander A Makarov; R Graham Cooks; Robert J Noll
Resonant ac dipolar excitation for ion motion control in the Orbitrap mass analyzer.
The journal of physical chemistry. A 2006;110(8):2682-9.
2006: Marcela Nefliu; Andre Venter; R Graham Cooks
Desorption electrospray ionization and electrosonic spray ionization for solid- and solution-phase analysis of industrial polymers.
Chemical communications (Cambridge, England) 2006;(8):888-90.
2006: Hao Chen; Ismael Cotte-Rodríguez; R Graham Cooks
cis-Diol functional group recognition by reactive desorption electrospray ionization (DESI).
Chemical communications (Cambridge, England) 2006;(6):597-9.
2006: Qingyu Song; Sameer Kothari; Michael A Senko; Jae C Schwartz; Jonathan W Amy; George C Stafford; R Graham Cooks; Zheng Ouyang
Rectilinear ion trap mass spectrometer with atmospheric pressure interface and electrospray ionization source.
Analytical chemistry 2006;78(3):718-25.
2006: Sergio C Nanita; R Graham Cooks
Serine octamers: cluster formation, reactions, and implications for biomolecule homochirality.
Angewandte Chemie (International ed. in English) 2006;45(4):554-69.
2006: Qizhi Hu; Nari Talaty; Robert J Noll; R Graham Cooks
Desorption electrospray ionization using an Orbitrap mass spectrometer: Exact mass measurements on drugs and peptides.
Rapid communications in mass spectrometry : RCM 2006;20(22):3403-8.
2006: Yishu Song; R Graham Cooks
Atmospheric pressure ion/molecule reactions for the selective detection of nitroaromatic explosives using acetonitrile and air as reagents.
Rapid communications in mass spectrometry : RCM 2006;20(20):3130-8.
2006: Tiina J Kauppila; Nari Talaty; Piia K Salo; Tapio Kotiaho; Risto Kostiainen; R Graham Cooks
New surfaces for desorption electrospray ionization mass spectrometry: porous silicon and ultra-thin layer chromatography plates.
Rapid communications in mass spectrometry : RCM 2006;20(14):2143-50.
2006: Huanwen Chen; Zhengzheng Pan; Nari Talaty; Daniel Raftery; R Graham Cooks
Combining desorption electrospray ionization mass spectrometry and nuclear magnetic resonance for differential metabolomics without sample preparation.
Rapid communications in mass spectrometry : RCM 2006;20(10):1577-84.
2006: R Graham Cooks; Hao Chen; Marcos N Eberlin; Xubin Zheng; W Andy Tao
Polar acetalization and transacetalization in the gas phase: the Eberlin reaction.
Chemical reviews 2006;106(1):188-211.
2006: Tiina J Kauppila; Justin M Wiseman; Raimo A Ketola; Tapio Kotiaho; R Graham Cooks; Risto Kostiainen
Desorption electrospray ionization mass spectrometry for the analysis of pharmaceuticals and metabolites.
Rapid communications in mass spectrometry : RCM 2006;20(3):387-92.
2006: Amy M Tabert; Michael P Goodwin; R Graham Cooks
Co-occurrence of boundary and resonance ejection in a multiplexed rectilinear ion trap mass spectrometer.
Journal of the American Society for Mass Spectrometry 2006;17(1):56-9.
2005: Nari Talaty; Zoltán Takáts; R Graham Cooks
Rapid in situ detection of alkaloids in plant tissue under ambient conditions using desorption electrospray ionization.
The Analyst 2005;130(12):1624-33.
2005: Hao Chen; R Graham Cooks; Eduardo C Meurer; Marcos N Eberlin
Hydrogen/Chlorine exchange reactions of gaseous carbanions.
Journal of the American Society for Mass Spectrometry 2005;16(12):2045-51.
2005: Justin M Wiseman; Satu M Puolitaival; Zoltán Takáts; R Graham Cooks; Richard M Caprioli
Mass spectrometric profiling of intact biological tissue by using desorption electrospray ionization.
Angewandte Chemie (International ed. in English) 2005;44(43):7094-7.
2005: Huanwen Chen; Nari Talaty; Zoltán Takáts; R Graham Cooks
Desorption electrospray ionization mass spectrometry for high-throughput analysis of pharmaceutical samples in the ambient environment.
Analytical chemistry 2005;77(21):6915-27.
2005: Ismael Cotte-Rodríguez; Zoltán Takáts; Nari Talaty; Huanwen Chen; R Graham Cooks
Desorption electrospray ionization of explosives on surfaces: sensitivity and selectivity enhancement by reactive desorption electrospray ionization.
Analytical chemistry 2005;77(21):6755-64.
2005: Huanwen Chen; Ruifeng Xu; Hao Chen; R Graham Cooks; Zheng Ouyang
Ion/molecule reactions in a miniature RIT mass spectrometer.
Journal of mass spectrometry : JMS 2005;40(11):1403-11.
2005: Zoltán Takáts; Justin M Wiseman; R Graham Cooks
Ambient mass spectrometry using desorption electrospray ionization (DESI): instrumentation, mechanisms and applications in forensics, chemistry, and biology.
Journal of mass spectrometry : JMS 2005;40(10):1261-75.
2005: Pengxiang Yang; R Graham Cooks; Zheng Ouyang; Adam M Hawkridge; David C Muddiman
Gentle protein ionization assisted by high-velocity gas flow.
Analytical chemistry 2005;77(19):6174-83.
2005: Hao Chen; Dina R Justes; R Graham Cooks
Proton affinities of N-heterocyclic carbene super bases.
Organic letters 2005;7(18):3949-52.
2005: Ester Marotta; Cristina Paradisi; R Graham Cooks
Novel CFCs-substitutes recommended by EPA (hydrofluorocarbon-245fa and hydrofluoroether-7100): ion chemistry in air plasma and reactions with atmospheric ions.
Journal of the American Society for Mass Spectrometry 2005;16(7):1081-92.
2005: Jormarie Alvarez; R Graham Cooks; S E Barlow; Daniel J Gaspar; Jean H Futrell; Julia Laskin
Preparation and in situ characterization of surfaces using soft landing in a Fourier transform ion cyclotron resonance mass spectrometer.
Analytical chemistry 2005;77(11):3452-60.
2005: Brian C Laughlin; Christopher C Mulligan; R Graham Cooks
Atmospheric pressure ionization in a miniature mass spectrometer.
Analytical chemistry 2005;77(9):2928-39.
2005: Ismael Cotte-Rodríguez; Eric Handberg; Robert J Noll; David P A Kilgour; R Graham Cooks
Improved detection of low vapor pressure compounds in air by serial combination of single-sided membrane introduction with fiber introduction mass spectrometry (SS-MIMS-FIMS).
The Analyst 2005;130(5):679-86.
2005: Igor A Popov; Hao Chen; Oleg N Kharybin; Eugene N Nikolaev; R Graham Cooks
Detection of explosives on solid surfaces by thermal desorption and ambient ion/molecule reactions.
Chemical communications (Cambridge, England) 2005;(15):1953-5.
2005: Zoltán Takáts; Ismael Cotte-Rodriguez; Nari Talaty; Huanwen Chen; R Graham Cooks
Direct, trace level detection of explosives on ambient surfaces by desorption electrospray ionization mass spectrometry.
Chemical communications (Cambridge, England) 2005;(15):1950-2.
2005: Bogdan Gologan; Jason R Green; Jormarie Alvarez; Julia Laskin; R Graham Cooks
Ion/surface reactions and ion soft-landing.
Physical chemistry chemical physics : PCCP 2005;7(7):1490-500.
2005: Sergio C Nanita; R Graham Cooks
Negatively-charged halide adducts of homochiral serine octamers.
The journal of physical chemistry. B 2005;109(10):4748-53.
2005: Justin M Wiseman; Zoltán Takáts; Bogdan Gologan; V Jo Davisson; R Graham Cooks
Direct characterization of enzyme-substrate complexes by using electrosonic spray ionization mass spectrometry.
Angewandte Chemie (International ed. in English) 2005;44(6):913-6.
2005: Alexander S Misharin; Brian C Laughlin; Andrey N Vilkov; Zoltán Takáts; Zheng Ouyang; R Graham Cooks
High-throughput mass spectrometer using atmospheric pressure ionization and a cylindrical ion trap array.
Analytical chemistry 2005;77(2):459-70.
2005: Lianming Wu; R Graham Cooks
Chiral and isomeric analysis by electrospray ionization and sonic spray ionization using the fixed-ligand kinetic method.
European journal of mass spectrometry (Chichester, England) 2005;11(2):231-42.
2004: Habib Bagheri; Hao Chen; R Graham Cooks
Chiral recognition by proton transfer reactions with optically active amines and alcohols.
Chemical communications (Cambridge, England) 2004;(23):2740-1.
2004: Bogdan Gologan; Zoltán Takáts; Jormarie Alvarez; Justin M Wiseman; Nari Talaty; Zheng Ouyang; R Graham Cooks
Ion soft-landing into liquids: Protein identification, separation, and purification with retention of biological activity.
Journal of the American Society for Mass Spectrometry 2004;15(12):1874-84.
2004: Hao Chen; Huanwen Chen; R Graham Cooks; Habib Bagheri
Generation of arylnitrenium ions by nitro-reduction and gas-phase synthesis of N-heterocycles.
Journal of the American Society for Mass Spectrometry 2004;15(11):1675-88.
2004: Thomas A Blake; Zheng Ouyang; Justin M Wiseman; Zoltán Takáts; Andrew J Guymon; Sameer Kothari; R Graham Cooks
Preparative linear ion trap mass spectrometer for separation and collection of purified proteins and peptides in arrays using ion soft landing.
Analytical chemistry 2004;76(21):6293-305.
2004: Zoltán Takáts; Justin M Wiseman; Bogdan Gologan; R Graham Cooks
Mass spectrometry sampling under ambient conditions with desorption electrospray ionization.
Science (New York, N.Y.) 2004;306(5695):471-3.
2004: Sergio C Nanita; Zoltan Takats; R Graham Cooks; Sunnie Myung; David E Clemmer
Chiral enrichment of serine via formation, dissociation, and soft-landing of octameric cluster ions.
Journal of the American Society for Mass Spectrometry 2004;15(9):1360-5.
2004: Zheng Ouyang; Guangxiang Wu; Yishu Song; Hongyan Li; Wolfgang R Plass; R Graham Cooks
Rectilinear ion trap: concepts, calculations, and analytical performance of a new mass analyzer.
Analytical chemistry 2004;76(16):4595-605.
2004: Zoltán Takáts; Justin M Wiseman; Bogdan Gologan; R Graham Cooks
Electrosonic spray ionization. A gentle technique for generating folded proteins and protein complexes in the gas phase and for studying ion-molecule reactions at atmospheric pressure.
Analytical chemistry 2004;76(14):4050-8.
2004: Hao Chen; Huanwen Chen; R Graham Cooks
Meisenheimer complexes bonded at carbon and at oxygen.
Journal of the American Society for Mass Spectrometry 2004;15(7):998-1004.
2004: Hao Chen; Xubin Zheng; Pengxiang Yang; R Graham Cooks
Reduction of nitroaromatics to arylnitrenium ions by vinyl halide cations.
Chemical communications (Cambridge, England) 2004;(6):688-9.
2004: Eduardo C Meurer; Hao Chen; Leah S Riter; R Graham Cooks; Marcos N Eberlin
Meerwein reaction of phosphonium ions with epoxides and thioepoxides in the gas phase.
Journal of the American Society for Mass Spectrometry 2004;15(3):398-405.
2004: Zoltán Takáts; R Graham Cooks
Thermal formation of serine octamer ions.
Chemical communications (Cambridge, England) 2004;(4):444-5.
2004: Lianming Wu; Eduardo C Meurer; R Graham Cooks
Chiral morphing and enantiomeric quantification in mixtures by mass spectrometry.
Analytical chemistry 2004;76(3):663-71.
2004: Eduardo C Meurer; Hao Chen; Leah Riter; Ismael Cotte-Rodriguez; Marcos N Eberlin; R Graham Cooks
Gas-phase reactions for selective detection of the explosives TNT and RDX.
Chemical communications (Cambridge, England) 2004;(1):40-1.
2004: Eugene N Nikolaev; Leah S Riter; Brian C Laughlin; Eric Handberg; R Graham Cooks
Trace analysis of organics in air by corona discharge atmospheric pressure ionization using an electrospray ionization interface.
European journal of mass spectrometry (Chichester, England) 2004;10(2):197-204.
2004: R Graham Cooks
John Beynon at Purdue.
Rapid communications in mass spectrometry : RCM 2004;18(1):7-10.
2003: Wolfgang R Plass; R Graham Cooks
A model for energy transfer in inelastic molecular collisions applicable at steady state or non-steady state and for an arbitrary distribution of collision energies.
Journal of the American Society for Mass Spectrometry 2003;14(12):1348-59.
2003: Zoltan Takats; Sergio C Nanita; Gitta Schlosser; Karoly Vekey; R Graham Cooks
Atmospheric pressure gas-phase H/D exchange of serine octamers.
Analytical chemistry 2003;75(22):6147-54.
2003: Amy M Tabert; Jens Griep-Raming; Andrew J Guymon; R Graham Cooks
High-throughput miniature cylindrical ion trap array mass spectrometer.
Analytical chemistry 2003;75(21):5656-64.
2003: Zheng Ouyang; Zoltán Takáts; Thomas A Blake; Bogdan Gologan; Andrew J Guymon; Justin M Wiseman; Justin C Oliver; V Jo Davisson; R Graham Cooks
Preparing protein microarrays by soft-landing of mass-selected ions.
Science (New York, N.Y.) 2003;301(5638):1351-4.
2003: Leah S Riter; Eduardo C Meurer; Ismael Cotte-Rodriguez; Marcos N Eberlin; R Graham Cooks
Solid phase micro-extraction in a miniature ion trap mass spectrometer.
The Analyst 2003;128(9):1119-22.
2003: Leah S Riter; Eduardo C Meurer; Eric Handberg; Brian C Laughlin; Hao Chen; Garth E Patterson; Marcos N Eberlin; R Graham Cooks
Ion/molecule reactions performed in a miniature cylindrical ion trap mass spectrometer.
The Analyst 2003;128(9):1112-8.
2003: Zoltan Takats; Sergio C Nanita; R Graham Cooks
Serine octamer reactions: indicators of prebiotic relevance.
Angewandte Chemie (International ed. in English) 2003;42(30):3521-3.
2003: Lianming Wu; W Andy Tao; R Graham Cooks
Kinetic method for the simultaneous chiral analysis of different amino acids in mixtures.
Journal of mass spectrometry : JMS 2003;38(4):386-93.
2003: Zoltan Takats; Sergio C Nanita; R Graham Cooks; Gitta Schlosser; Karoly Vekey
Amino acid clusters formed by sonic spray ionization.
Analytical chemistry 2003;75(6):1514-23.
2003: Hao Chen; Xubin Zheng; R Graham Cooks
Ketalization of phosphonium ions by 1,4-dioxane: selective detection of the chemical warfare agent simulant DMMP in mixtures using ion/molecule reactions.
Journal of the American Society for Mass Spectrometry 2003;14(3):182-8.
2003: Lianming Wu; Karel Lemr; Tenna Aggerholm; R Graham Cooks
Recognition and quantification of binary and ternary mixtures of isomeric peptides by the kinetic method: metal ion and ligand effects on the dissociation of metal-bound complexes.
Journal of the American Society for Mass Spectrometry 2003;14(2):152-60.
2003: Lianming Wu; R Graham Cooks
Chiral analysis using the kinetic method with optimized fixed ligands: applications to some antibiotics.
Analytical chemistry 2003;75(3):678-84.
2003: Lianming Wu; Rebecca L Clark; R Graham Cooks
Chiral quantification of D-, L-, and meso-tartaric acid mixtures using a mass spectrometric kinetic method.
Chemical communications (Cambridge, England) 2003;(1):136-7.
2003: Sung-Chan Jo; R Graham Cooks
Translational to vibrational energy conversion during surface-induced dissociation of n-butylbenzene molecular ions colliding at self-assembled monolayer surfaces.
European journal of mass spectrometry (Chichester, England) 2003;9(4):237-4.
2003: Rodinei Augusti; Maciej Turowski; R Graham Cooks
Membrane introduction mass spectrometry for monitoring complexation equilibria of beta-cyclodextrin with substituted benzenes.
The Analyst 2003;128(1):61-4.
2003: W Andy Tao; R Graham Cooks
Chiral analysis by MS.
Analytical chemistry 2003;75(1):25A-31A.
2003: Tenna Aggerholm; Sergio C Nanita; Kim J Koch; R Graham Cooks
Clustering of nucleosides in the presence of alkali metals: Biologically relevant quartets of guanosine, deoxyguanosine and uridine observed by ESI-MS/MS.
Journal of mass spectrometry : JMS 2003;38(1):87-97.
2002: Leah S Riter; Yanan Peng; Robert J Noll; Garth E Patterson; Tenna Aggerholm; R Graham Cooks
Analytical performance of a miniature cylindrical ion trap mass spectrometer.
Analytical chemistry 2002;74(24):6154-62.
2002: Garth E Patterson; Andrew J Guymon; Leah S Riter; Mike Everly; Jens Griep-Raming; Brian C Laughlin; Zheng Ouyang; R Graham Cooks
Miniature cylindrical ion trap mass spectrometer.
Analytical chemistry 2002;74(24):6145-53.
2002: Lianming Wu; Jeff W Denault; R Graham Cooks; László Drahos; Károly Vékey
Alkali chloride cluster ion dissociation examined by the kinetic method: heterolytic bond dissociation energies, effective temperatures, and entropic effects.
Journal of the American Society for Mass Spectrometry 2002;13(12):1388-95.
2002: Thomas A Blake; Xubin Zheng; Tenna Aggerholm; Frants R Lauritsen; R Graham Cooks
Determination of pentachlorophenol by negative ion chemical ionization with membrane introduction mass spectrometry.
The Analyst 2002;127(11):1463-6.
2002: Daniella V Augusti; Rodinei Augusti; Fernando Carazza; R Graham Cooks
Quantitative determination of the enantiomeric composition of thalidomide solutions by electrospray ionization tandem mass spectrometry.
Chemical communications (Cambridge, England) 2002;(19):2242-3.
2002: Hongyan Li; Wolfgang R Plass; Garth E Patterson; R Graham Cooks
Chemical mass shifts in resonance ejection experiments in the quadrupole ion trap.
Journal of mass spectrometry : JMS 2002;37(10):1051-8.
2002: Lianming Wu; W Andy Tao; R Graham Cooks
Ligand and metal-ion effects in metal-ion clusters used for chiral analysis of alpha-hydroxy acids by the kinetic method.
Analytical and bioanalytical chemistry 2002;373(7):618-27.
2002: W Andy Tao; Rebecca L Clark; R Graham Cooks
Quotient ratio method for quantitative enantiomeric determination by mass spectrometry.
Analytical chemistry 2002;74(15):3783-9.
2002: Daniella V Augusti; Fernando Carazza; Rodinei Augusti; W A Tao; R Graham Cooks
Quantitative chiral analysis of sugars by electrospray ionization tandem mass spectrometry using modified amino acids as chiral reference compounds.
Analytical chemistry 2002;74(14):3458-62.
2002: Kim J Koch; Tenna Aggerholm; Sergio C Nanita; R Graham Cooks
Clustering of nucleobases with alkali metals studied by electrospray ionization tandem mass spectrometry: implications for mechanisms of multistrand DNA stabilization.
Journal of mass spectrometry : JMS 2002;37(7):676-86.
2002: Nathan Wade; Chris Evans; Sung-Chan Jo; R Graham Cooks
Silylation of an OH-terminated self-assembled monolayer surface through low-energy collisions of ions: a novel route to synthesis and patterning of surfaces.
Journal of mass spectrometry : JMS 2002;37(6):591-602.
2002: Yanan Peng; Wolfgang R Plass; R Graham Cooks
Correlations of chemical mass shifts of para-substituted acetophenones and benzophenones with Brown's sigma constants.
Journal of the American Society for Mass Spectrometry 2002;13(6):623-9.
2002: KJ Koch; Fabio C Gozzo; Sergio C Nanita; Zoltan Takats; Marcos N Eberlin; R Graham Cooks
Chiral transmission between amino acids: chirally selective amino acid substitution in the serine octamer as a possible step in homochirogenesis.
Angewandte Chemie (International ed. in English) 2002;41(10):1721-4.
2002: Chris Evans; Nathan Wade; Federico Pepi; Greg Strossman; Tom Schuerlein; R Graham Cooks
Surface modification and patterning using low-energy ion beams: Si-O bond formation at the vacuum/adsorbate interface.
Analytical chemistry 2002;74(2):317-23.
2002: Leah S Riter; Brian C Laughlin; Eugene N Nikolaev; R Graham Cooks
Direct analysis of volatile organic compounds in human breath using a miniaturized cylindrical ion trap mass spectrometer with a membrane inlet.
Rapid communications in mass spectrometry : RCM 2002;16(24):2370-3.
2001: Leah S Riter; Zoltán Takáts; R Graham Cooks
Single-sided membrane introduction mass spectrometry for on-line determination of semi-volatile organic compounds in air.
The Analyst 2001;126(11):1980-4.
2001: L Charles; Leah S Riter; R Graham Cooks
Direct analysis of semivolatile organic compounds in air by atmospheric pressure chemical ionization mass spectrometry.
Analytical chemistry 2001;73(21):5061-5.
2001: KJ Koch; F C Gozzo; Dongmao Zhang; Marcos N Eberlin; R Graham Cooks
Serine octamer metaclusters: formation, structure elucidation and implications for homochiral polymerization.
Chemical communications (Cambridge, England) 2001;(18):1854-5.
2001: Zoltan Takats; KJ Koch; R Graham Cooks
Organic chloramine analysis and free chlorine quantification by electrospray and atmospheric pressure chemical ionization tandem mass spectrometry.
Analytical chemistry 2001;73(18):4522-9.
2001: R Graham Cooks; Dongmao Zhang; KJ Koch; F C Gozzo; Marcos N Eberlin
Chiroselective self-directed octamerization of serine: implications for homochirogenesis.
Analytical chemistry 2001;73(15):3646-55.
2001: Xubin Zheng; W Andy Tao; R Graham Cooks
Gas-phase SN2 reactivity of dicoordinated borinium cations using pentaquadrupole mass spectrometry.
Journal of the American Society for Mass Spectrometry 2001;12(8):948-55.
2001: Nathan Wade; J Shen; J Koskinen; R Graham Cooks
Reactions of BBr(n)(+) (n = 0--2) at fluorinated and hydrocarbon self-assembled monolayer surfaces: observations of chemical selectivity in ion--surface scattering.
Journal of mass spectrometry : JMS 2001;36(7):717-25.
2001: W Andy Tao; Lianming Wu; R Graham Cooks
Differentiation and quantitation of isomeric dipeptides by low-energy dissociation of copper(II)-bound complexes.
Journal of the American Society for Mass Spectrometry 2001;12(5):490-6.
2001: Leah S Riter; L Charles; Maciej Turowski; R Graham Cooks
External interface for trap-and-release membrane introduction mass spectrometry applied to the detection of inorganic chloramines and chlorobenzenes in water.
Rapid communications in mass spectrometry : RCM 2001;15(23):2290-5.
2001: Y I Lee; Sung-Chan Jo; W Andy Tao; R Graham Cooks
Metal-assisted esterification: glutaric acid-iron(II) complexes in the gas phase.
Rapid communications in mass spectrometry : RCM 2001;15(7):484-8.
2000: Jeff W Denault; Chris Evans; KJ Koch; R Graham Cooks
Surface modification using a commercial triple quadrupole mass spectrometer.
Analytical chemistry 2000;72(23):5798-803.
2000: Leah S Riter; D F Fraley; R Graham Cooks
Denitration of nitroaromatic compounds by arylnitrile radical cations.
Journal of the American Society for Mass Spectrometry 2000;11(1):33-9.
1999: W Andy Tao; P D Thomas; F Wang; Dongmao Zhang; R Graham Cooks
Kinetic Resolution of d,l-Amino Acids Based on Gas-Phase Dissociation of Copper(II) Complexes.
Analytical chemistry 1999;71(19):4427-9.
1998: E R Badman; R C Johnson; Wolfgang R Plass; R Graham Cooks
A miniature cylindrical quadrupole ion trap: simulation and experiment.
Analytical chemistry 1998;70(23):4896-901.
1998: E R Badman; H A Bui; J Mitchell Wells; R Graham Cooks
Fourier transform detection in a cylindrical quadrupole ion trap.
Analytical chemistry 1998;70(17):3545-7.
1998: J Mitchell Wells; E R Badman; R Graham Cooks
A quadrupole ion trap with cylindrical geometry operated in the mass-selective instability mode.
Analytical chemistry 1998;70(3):438-44.
1997: G Chen; P Wong; R Graham Cooks
Estimation of Free Radical Ionization Energies by the Kinetic Method and the Relationship between the Kinetic Method and the Hammett Equation.
Analytical chemistry 1997;69(17):3641-5.
1996: P S Wong; S Ma; R Graham Cooks
Ionization energy determination by the kinetic method.
Analytical chemistry 1996;68(23):4254-6.
1996: M Soni; V Frankevich; M Nappi; R E Santini; J W Amy; R Graham Cooks
Broad-band fourier transform quadrupole ion trap mass spectrometry.
Analytical chemistry 1996;68(19):3314-20.
1995: N Kasthurikrishnan; R Graham Cooks
On-line flow injection analysis of volatile organic compounds in seawater by membrane introduction mass spectrometry.
Talanta 1995;42(9):1325-34.
1994: B K Teeter; L E Dejarme; T K Choudhury; R Graham Cooks; R E Kaiser
Determination of ammonia, ethanol and acetic acid in solution using membrane introduction mass spectrometry.
Talanta 1994;41(8):1237-45.
1993: A Ranasinghe; L Lu; T K Majumdar; R Graham Cooks; W K Fife; S Rubinsztajn; M Zeldin
Structural characterization and sequence distributions of polysiloxanes using pyrolysis MS/MS.
Talanta 1993;40(8):1233-43.
1993: S J Bauer; R Graham Cooks
Performance of an ion trap mass spectrometer modified to accept a direct insertion membrane probe in analysis of low level pollutants in water.
Talanta 1993;40(7):1031-9.
1993: T K Majumdar; A Ranasinghe; L Lu; R Graham Cooks; W K Fife; M Zeldin
Structural characterization of poly(N-alkyl-4-vinylpyridinium) triflates using pyrolysis/tandem mass spectrometry.
Talanta 1993;40(3):363-79.
1992: T K Choudhury; Tapio Kotiaho; R Graham Cooks
Analysis of acrolein and acrylonitrile in aqueous solution by membrane introduction mass spectrometry.
Talanta 1992;39(9):1113-20.
1992: T K Choudhury; Tapio Kotiaho; R Graham Cooks
Detection of low molecular weight aldehydes in aqueous solution by membrane introduction mass spectrometry.
Talanta 1992;39(6):573-80.
1991: Tapio Kotiaho; A K Lister; M J Hayward; R Graham Cooks
On-line monitoring of chloramine reactions by membrane introduction mass spectrometry.
Talanta 1991;38(2):195-200.
1989: J S Brodbelt-Lustig; R Graham Cooks
Determination of relative gas-phase basicities by the proton-transfer equilibrium technique and the kinetic method in a quadrupole ion-trap.
Talanta 1989;36(1-2):255-60.
1986: W B Emary; I Isern-Flecha; Karl V Wood; T Y Ridley; R Graham Cooks
Desorption ionization/tandem mass spectrometry with a caesium ion source and a triple quadrupole mass spectrometer.
Talanta 1986;33(12):1001-7.
1986: L D Detter; S J Pachuta; R Graham Cooks; Richard A Walton
Effects of vacuum on tetrakis-isocyanide complexes of silver(I) and copper(I): Implications for sims analyses.
Talanta 1986;33(11):917-8.